Final answer:
The volume of air in the lungs after a maximal inhalation is the total lung capacity.
Step-by-step explanation:
After taking a very deep breath, at maximal inhalation, the volume of air in the lungs is the total lung capacity. This refers to the maximum amount of air that can be moved in or out of the lungs in a single respiratory cycle. Human lung size is determined by genetics, sex, and height, and at maximal capacity, an average lung can hold almost six liters of air.